For this scheduled revision, ERS implemented minor, but important, improvements in the estimation model used to develop all annual food dollar statistics. The improvements address some inconsistencies in the way that standard IO accounts represent the U.S. food system, such as how food-away-from-home expenditures at non-conventional eating places—for example, sports arenas and passenger travel—are traced through the food supply chain and how wholesale and retail establishments in the food industry are distinguished from other trade establishments. The combined changes to the estimation model had little or no impact on some estimates, but in many cases, changes resulted in both upward and downward revisions in the historical data series. Thus, revisions were applied back to the beginning year of the food dollar series—1993.